/*
 * BasicTazioID.java.java    0.0.1    Oct 24, 2009
 * 
 * Copyright (c) 2009 mentalsmash.org
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * The use of the Apache License does not indicate that this project is
 * affiliated with the Apache Software Foundation.
 */
package org.mentalsmash.tazio.core.identifiers;

/**
 * This class provides a basic implementation of the {@link TazioID} interface
 * but relies on subclasses' implementation of the {@link TazioID#getLocalID()} method
 * to carry out its logic.
 * 
 * @version 0.0.1 Oct 24, 2009
 * @author Andrea Sorbini <as@mentalsmash.org>
 *
 */
public abstract class BasicTazioID implements TazioID {

	private static final long serialVersionUID = 6372364525799211699L;
	
	private final TazioNodeID node;
	
	public BasicTazioID(TazioNodeID node){
		this.node = node;
	}

	@Override
	public TazioNodeID getNode(){
		return this.node;
	}
	
	@Override
	public String getValue(){
		return this.node.getValue() + ":" + this.getLocalID();
	}
	
	/* (non-Javadoc)
	 * @see java.lang.Object#hashCode()
	 */
	@Override
	public int hashCode() {
		String value = this.getValue();
		
		final int prime = 31;
		int result = 1;
		result = prime * result + ((value == null) ? 0 : value.hashCode());
		return result;
	}

	/* (non-Javadoc)
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		BasicTazioID other = (BasicTazioID) obj;
		String value = this.getValue();
		
		if (value == null) {
			if (other.getValue() != null)
				return false;
		} else if (!value.equals(other.getValue()))
			return false;
		return true;
	}
	
	@Override
	public String toString(){
		return this.getValue();
	}
}
